Production hoist



J.- W. ADAMS PRODUCTION HOISI'I' Oct. 23, 1934.

Filed Jan. 20, 1955 4 Sheets-Sheet 1 ATTORNEYS INVENTOR James Wfldanw Oct. 23, 1934. J. w. ADAMS 1,977,340

PRODUCTION HOIST Filed Jan. 20, 1953 4 Sheets-Sheet 2 INVENTOR James Wfldams BY Qufiau ATTORNEYS Oct. 23, 1934. J. W. ADAMS PRODUCTION HOIST 4 Sheets-Sheet 3 Filed Jan. 20, 1933 VRSS INVENTOR James Wfldams ATTORNEYS Gilt. 23, J w ADAMS PRODUCTION HOIST Filed Jan. 20, 1933 4 Sheets-Sheet 4 INVENTOR Jam Wfldanw BY ATTORNEYS Patented Oct. 23, 1934 PRODUCTION HOIST James W. Adams, Dallas,

Tex., assignor to Oil Well Supply Company, Dallas, Tex., a corporation of New Jersey Application January 20, 1933, Serial No. 652,705,

7 Claims. (01. 254-137) Some wells are pumped by means of what is known as the gas or air-lift system, or by pumping columns of liquid through the tubing in order to operate a pump piston located at the lower end of the tubing. In either one of the last two named methods, no sucker rods are used, but tubing and other equipment'to replace the rods is essential. Valves and other moving parts located at points below the surfaceoccasionally give trouble due to wear, sanding up, breakage, etc. and must be replaced. It frequently happens that a well must be cleaned out or drilled deeper. When any trouble occurs in the operation of the parts located at the lower end of the well, or, if the well is to be cleaned out or drilled deeper, it becomes necessary to remove the rods or tubing or both. In order to accomplish the removal of these parts, it is necessary that some kind of hoisting equipment be employed since the equipment used in the drilling of the well will have been removed about the timethe well has been drilled. The production hoist of my invention is particularly suited for handling the equipment employed in the operation of a well, and is termed a production hoist since it is used on wells which have gone on production or are being made ready to go on production.

Equipment used in connection with the hoist for handling the equipmentof the well generally consists of a line attached to the hoist drum and thela. carried over a sheave or sheaves located on the top of the derrick, having attached to its free end a hook and elevators, or the equivalent. When rods or tubing are beinghandled, they are attached to an elevator, which elevator, in turn, is connected to the hook that is attached to the free end of the hoisting line. Naturally, when elevating equipment from within the well, the load will be carried by the hoist drum and the drum receives its power from some source of prime mover. Should the hoisting operation be considered, it is readily seen that, after portions of the material being elevated from the well have been disconnected from parts still remaining in the well, the removed parts are stood or positioned so that they rest on the derrick floor and extend upwardly into the derrick. The hook, with the elevator attached; is then disconnected from the uppermost section of the material standing in the derrick and is then lowered by releasing the brake on the hoist drum flange.

The reason for lowering is to connect onto the material still down in the well and to elevate same. Since there is no load on the hook when 5 being lowered, its travel downwardly due to its weight alone would be very slow, for there is not sufficient weight to overcome the friction of the moving parts of the hoist, sheaves, etc. In order to overcome this slow, downward travel, Ihave provided in my hoist a reversing mechanism which enables me to run the hoist drum in such a manner as to unreel the hoisting line, thereby eliminating the frictional resistance of the drum and allowing the hook to drop freely and rapidly.

The object of my invention is to provide a hoist of the above type of a strong, compact construction and cheap to manufacture and maintain in operation.

It is also the intention of this invention to pro- 7 duce a hoist for handling material about a well, which hoist will operate in either direction with:- out resorting to methods other than the operation of a clutch lever.

Another object of the invention is to produce a hoist in which the hoist drum can be operated at will in either direction and, also, held stationary for holding the load'in suspension when not being revolved.

Other objects of the invention will appear more fully from .the following description.

The invention is illustrated by way of example in the accompanying drawings, in which- Fig. 1.is a front elevation of a hoist embodying a preferred form of the invention.

Fig. 2 is a side elevation of the hoist, parts being broken away to show the construction.

Figs. 3and 4 are views on a smaller scale taken on lines'33 and 4-4 of Fig. 5.

v Fig, 5 is a longitudinal vertical section of the hoist.

Fig. 6 is a detail section of a part of the hoist taken on line 6-6 of Fig. 5.

Figs. 7, 8 and 9 are perspective views of different parts of the hoist.

In the embodiment shown in the accompanying drawings a hoisting drum 10 is rotatably mounted on a fixed or stationary shaft 11 supported between end supports 12 and 13 and held from rotation therein by means of pins 14 and 15. The end 1 supports 12 and 13 may be mounted on a suitable base or skids 16 and may be of a shape to support the drum against driving stresses. The drum 10 is provided at one end with a retaining flange l7 and at the opposite end with a flange 18 having an annular concentric brake flange l9 and, within and concentric with the flange 19, a driven clutch flange 20. A reversing ring 21 having a contact driven face shown, by Way of example, as of conical curvature is mounted on the driving flange 18 and is keyed thereto by a key 22 which, in turn, is held in position by a pin 23. The drum 10 may be held in fixed position by means of a brake band 24 held at one end by means of dead end bolts 25 which are secured in lugs 26 mounted on the end of the brake band 24, and. which anchor the latter to bearings or anchors 27 mounted on the base or skids 16. The-other end of. the brake band is connected by a link 28 to an operating crank 29 on a shaft 30, which extends lengthwise of the drum and is mounted in suitable bearings in the anchors 2'7.

The crank shaft 30 may be given rotation to braking position or the reverse by means of an operating lever 31. The brake band 24 may be provided with suitable lagging or lining 32. When the lever 31 is rotated downwardly or counterclockwise from the position shown in Fig. 2, the brake band tightens onto the brake flange 19 and holds the drum from rotation in either direction. When the lever 31 is lifted, the brake band enlarges and releases the drum.

The drum 10 is driven either in hoisting or reverse direction by power transmitted from a suitable prime mover to a sprocket wheel 33 having an elongated hub 34 rotatably mounted on the fixed shaft 11. The hub 34 is provided with suitable bearing bushings 35 and is held from longitudinal movement by and between a thrust collar 36 pinned to the shaft 11 by the set screw 37, and

' at the other end by a thrust washer 38 between the end of the hub 34 and the support 13. When the drum 10 is to be driven in a hoisting direction from the sprocket wheel 33, the movement of the latter is transmitted directly to the driven flange 20 from a clutch band 39 suspended from a pin 40 mounted in a boss 41 on the sprocket wheel 33.

' The clutch band 39 is mounted and supported at one end on the pin 40 by means of spaced lugs 42. The opposite end of the clutch band is connected by means of a lug 43 and a link 44 to a rock arm 45 rotatably mounted on the pin 40. The rock arm 45 is rocked in position to tighten or to release, the clutch band 39 by means of a hand operated lever 46 or pedal 47 acting through a crank arm 48 and link 49 to rock a yoke arm 50 pivoted at 51 on a bracket 52 on the end support 13. When the pedal 47 is depressed or the lever 48 swung counter-clockwise the link 49 is moved to the left in Fig. 1 against the action of a spring 53 and the yoke arm 50 is swung clockwise as viewed in Fig. 1;

A yoke 54 on the opposite end of the yoke arm 50 is thereby moved to the right in Fig. 1, carrying with it a sliding collar 55 to which it is secured by a pair of pins 56 that ride in an annular groove in the collar. The collar 55 is keyed by means of a key 57 to the hub 34 in such a manner as to slide on and rotate with the latter and, therefore. to rotate with the sprocket wheel 33 and with the pin 40. A thrust collar 58 is rigidly secured to the collar 55 and rotates and'slides with the latter. The link 59 is pivoted at one end to a pin 60 on the thrust collar 58 and at its opposite end is pivoted to a lever 61 pivoted on a bracket 62 carried on the sprocket wheel.

The link 59 rotates as a unit with the lever 61 and the thrust collar 58 and sprocket wheel 53 both of which rotate at the same angular velocity. As the collars 55 and 58 are drawn to the right, the link 59 is straightened and its outer free end moves radially outwardly thereby tilting the lever 61 to a counter-clockwise position viewed in the position of Fig. 5, or to a clockwise position viewed in the position of Fig. 7.

The opposite arm of the lever 61 from that connected to the link 59 is thereby moved downwardly. This end of the lever is provided with a pin 63 which extends into a slot 64 in the rock arm 45 thereby swinging the latter on the pivot pin 40 in such a position as to draw the link 44 upwardly and to tighten the clutch band 39 onto the clutch flange 20. The clutch band 39 is provided witha suitable brake lining or pad64 so that as the band tightens on the clutch flange 20 it grips the latter. The clutch band 39 is rigidly secured to the rotating pin 40 which rotates with the sprocket wheel 33 and consequently the clutch band 39 rotates and carries with it the clutch flange 20 and the drum 10. In this position of the yoke arm 50, therefore, the drum 10 is clutched directly to the sprocket wheel 33 and is driven in a hoisting direction.

The clutch band 39 may be provided with outwardly projecting threaded studs 65 that pass through rods 66 projecting sidewise from the sprocket wheel 33 and serve to prevent the brake band from sagging or otherwise becoming distorted, in which event parts of the brake band would drag on the clutch flange 20. As there is considerable thrust on the collar 58 the latter may be provided with a Babbitt lining 67 and with suitable lubricating meansto enable it to slide freely.

The yoke arm 50 and its associated parts may be held in clutch engaging position by means of a latch 68 attached, to the pedal 47 and adapted to engage a part of the frame or skids 16. When the latch 68 is released the yoke arm 50 and the parts operated thereby may be returned 'to a neutral position, indicated in Fig. 5, in which the rock arm 45 and link 44 are moved to position to release the clutch band 39. If the lever 46 be swung still farther from the clutch engaging position, the collars 55 and 58 are moved still farther to the left in Fig. 5 until a friction sur-- face 69 preferably of conical curvature on the thrust collar is brought into engagement with a series of friction cones or other rotating friction elements 70, four being shown by way of 120 example in Fig. 4, rotatably mounted on a spider or frame 71 mounted on the supporting shaft 11 and held stationary thereon by a key 72.

As the rotating friction surface 69 contacts with the cones it rotates the latter about radi- 125 ally arranged pinion pins '73. The spider '71 is slidably mounted on the supporting shaft 11 and as the collar 58 moves still farther to the left the spider and friction cones '70 are pushed toward and into contact with the conical fric- 130 tion surface 21 on the drum 10. The direction of rotation transmitted through the cones '70 to the friction surface 21 is the reverse of the direction of rotation of the friction surface 69 and consequently of the sprocket wheel 33 with which it rotates. Movement of the yoke arm 50 in this reverse direction, therefore, serves to rotate the drum 10 in reverse direction, unwinding the cable that may be wound thereon and enabling a traveling block to descend freely and without the necessity of unwinding the drum by its weight.

When the yoke arm 50 and the collars 55 and 58 connected thereto are returned to neutral or to direct driving position, means are provided to separate the friction cone 70 from contact 1 with the friction surface 21 thereby to prevent excessive wear. For this purpose the spider 71 is pushed away from the drum 10 by means of coil springs 74 confined in and between sockets '15 m the drum 10 and a thrust ring 76 rotatably 15 mounted on the hub of the spider '71 and caused to rotate, with the drum 10 by means of holding pins 77 mounted in the thrust ring 76 and extending into-the sockets 75. Other pins 78 (-Fig. 5) are also provided which are mounted in the thrust ring 76 and project into sockets 79 in which they fit more snugly to provide a firmer drive for the rotation of the thrust ring 76. The springs '74 are of such length as to move the spider 71 and the friction cone 70 out of contact with the friction surface 21 but not to contact with the friction surface 69 when the yoke arm and associated elements are in neutral position. The spider 71 is confined to limited movement by means of the thrust collar 36 at one side and a thrust collar 80 at the opposite side.

Through the above invention a very compact driving and reversing mechanism is provided and means are provided whereby the hoist mechanism may be connected either in direct, neutral, or reverse driving position by a straightaway movement of the lever in one direction or the reverse. Associated with this mechanism in a compact arrangement is a brake mechanism for holding the drum in neutral position.

What I claim is- 1. A production hoist comprising a drum, a driven flange for said drum, a reverse driving mechanism comprising a driven contact face connected to said drum, a driving face and an intermediate revolvable member between said driven face and said driving face, and means alternatively to clutch a driving means to said driven flange or to bring said driving face and said driven contact face into contact with said intermediate revolvable member to 'rotatesaid drum in reverse direction.

2. A production hoist comprising a rotatable drum, said drum having a driven clutch flange and a contact driven surface within said flange, driving means, a clutch band connected to and driven by said driving means, means operable in one direction to tighten said clutch band on said driven flange, a contact driving face rotating with said driving means, an intermediate revolvable member between said driving and driven faces and held against rotation about the axis of said faces, and means to move said driving and driven faces into contact with said revolvable members.

3. A production hoist comprising a stationary supporting shaft, a drum rotatably mounted on said shaft, a driving means rotatable on said shaft independently of said drum, a clutch flange on said drum, a driven contact face on said drum and a driving contact face on said driving means, a spider between said faces held from rotation on said shaft, an intermediate revolvable member freely rotatable on a radial axis on said spider,

and means movable in one direction to bring said driving and driven faces into contact with the surfaces of said revolvable member and movable in the opposite direction to clutch said driving member to said clutch flange.

4. A production hoist comprising a stationary supporting shaft, a drum rotatably mounted on said shaft, driving means rotatable on said shaft independently of said drum, a driven contact face on said drum and a driving contact face on said driving means, a spider between said faces slidably keyed on said shaft, and an intermediate revolvable member freely rotatable on a radial axis on said spider, said driving contact face being movable toward said driven contact face to drive the latter through said intermediate revolvable member.

5. A production hoist comprising a stationary supporting shaft, a drum rotatably mounted on said shaft, driving means rotatable on said shaft independently of said drum, a driven contact face on said drum and a driving contact face on said driving means, a spider between said faces slidably keyed on said shaft, an intermediate revolvable member freely rotatable on a radial axis on said spider, said driving contact face being movable toward said driven contact face to drive the latter through said intermediate revolvable member, and means operable alternatively to clutch said driving means directly to said drum.

6. A production hoist comprising a stationary supporting shaft, a drum rotatably mounted on said shaft, 8. driving wheel rotatably mounted on said shaft independently of said drum, a clutch flange on said drum, a driven coniact face on 110 said drum, means slidably keyed on said wheel and having a driving contact face, a spider keyed on said shaft between said contact faces, an intermediate revolvable member mounted on a radial axis on saidspider, a clutch on said wheel 115 adapted to engage said clutch flange on said drum, said slidable means movable to bring said contact faces and revolvable member into driving contact and movable in the opposite direction, and mechanism actuated by said slidable means moving in said opposite direction to cause said clutch to engage said clutch face.

7. A production hoist comprising a rotatable drum, a driving means, a 'driven face on said drum and reverse driving mechanism comprising rotatable elements fixed against rotation about the axis of said drum between said driving eiement and said face, and means movable in one direction to clutch said driving means directly to said drum and in the opposite direction to contact said driving means andsaid face with said rotatable elements to drive said drum in reverse direction through said elements.

JAMES W. ADAMS. 

